Artigo Completo - Open Access.

Idioma principal | Segundo idioma

CHEMICAL KINETICS ANALYSIS OF NO AND CO FORMATION BASED ON THERMODYNAMIC DATA FROM AN ETHANOL-FUELED ENGINE COMPUTATIONAL MODEL

CHEMICAL KINETICS ANALYSIS OF NO AND CO FORMATION BASED ON THERMODYNAMIC DATA FROM AN ETHANOL-FUELED ENGINE COMPUTATIONAL MODEL

LIMA, A. J. T. B. de ; GALLO, W. L. R. ;

Artigo Completo:

A series of theoretical analyses of pollutant formation has been undertaken on a computer program based on temperature and volume data from a two-zone internal combustion engine model. The objective was to predict the formation of nitric oxide and carbon monoxide during combustion process in an ethanol-fueled engine before the three-way catalyst operation. The predictions were based on a chemical kinetics model, which considered 12 chemical species and 22 chemical reactions. The model calculated the reaction rates from the beginning of the combustion process until chemical kinetics calculations showed no effect on the gases composition during expansion. The developed analysis tested some temperatures in order to discover until when chemical kinetics effectiveness was considerable. This analysis involved the study of NO and CO formation rates. The considered range of temperatures was between 2500 and 1500K, typical engine temperatures during combustion and expansion processes. Results showed that NO and CO formation were qualitatively coherent when compared to known formation measures by ICEs presented on literature. The studied temperatures allow the possibility of maintaining constant the concentration of some species from specific moments during expansion process, without changing significantly formation results.

Artigo Completo:

A series of theoretical analyses of pollutant formation has been undertaken on a computer program based on temperature and volume data from a two-zone internal combustion engine model. The objective was to predict the formation of nitric oxide and carbon monoxide during combustion process in an ethanol-fueled engine before the three-way catalyst operation. The predictions were based on a chemical kinetics model, which considered 12 chemical species and 22 chemical reactions. The model calculated the reaction rates from the beginning of the combustion process until chemical kinetics calculations showed no effect on the gases composition during expansion. The developed analysis tested some temperatures in order to discover until when chemical kinetics effectiveness was considerable. This analysis involved the study of NO and CO formation rates. The considered range of temperatures was between 2500 and 1500K, typical engine temperatures during combustion and expansion processes. Results showed that NO and CO formation were qualitatively coherent when compared to known formation measures by ICEs presented on literature. The studied temperatures allow the possibility of maintaining constant the concentration of some species from specific moments during expansion process, without changing significantly formation results.

Palavras-chave: ethanol-fueled engine,

Palavras-chave:

DOI: 10.5151/engpro-simea2017-25

Referências bibliográficas
  • [1] N. D. Brinkman. Ethanol Fuel - A single-cylinder engine study of efficiency and exhaust emissions. SAE Technical Paper, SAE Transactions 1981(SAE No. 810345), 198
  • [2] M. E. Dias de Oliveira, B. E. Vaughan, and E. J. Rykiel. Ethanol as fuel: energy, carbon dioxide balances, and ecological footprint. BioScience, Vol. 55(No. 7):593–602, 2005.
  • [3] L. J. Spadaccini and W. Chinitz. An investigation of Nonequilibrium Effects in an Internal Combustion Engine. Journal of Engineering for Power - ASME, Vol. 11, 1972.
  • [4] H. K. Newhall. Kinetics of engine-generated nitrogen oxides and carbon monoxide. Symposium (International) on Combustion, 12(No. 1):603–613, 1969.
  • [5] W. J. D. B. Annand. Effects Of Simplifying Kinetic Assumptions In Calculating Nitric Oxide Formation In Spark-Ignition Engines. Combustion Engines Group, 188(1):431–436, 1974.
  • [6] R. J. Kee, Michael Elliott Coltrin, and Peter. Glarborg. Chemically reacting flow : theory and practice. John-Wiley & Sons, pages 1–848, 2003.
  • [7] R. L. Burden and A. G. Faires. Numerical Analysis. Cencage Learning, pages 1 – 895, 2013.
  • [8] R. J. B. Way. Methods for Determination of Composition and Thermodynamic Properties of Combustion Products for Internal Combustion Engine Calculations. Combustion Engines Group, 190(1):687–697, 1976.
  • [9] W. Tsang and R. F. Hampson. Chemical Kinetic Data Base for Combustion Chemistry. Part I. Methane and Related Compounds. Journal of Physical and Chemical Reference Data, 15(3):1087–1279, 1986.
  • [10] D. L. Baulch, C. J. Cobos, R. A. Cox, C. Esser, P. Frank, Th. Just, J. A. Kerr, M. J. Pilling, J. Troe, R. W. Walker, and J. Warnatz. Evaluated Kinetic Data for Combustion Modeling. Journal of Physical and Chemical Reference Data, 21(3):411–734, 1992.
  • [11] V. Lissianski, H. Yang, Z. Qin, M.R. Mueller, K.S. Shin, and W.C. Gardiner. High-temperature measurements of the rate coefficient of the H + CO2 => CO + OH reaction. Chemical Physics Letters, 240(1):57 – 62, 1995.
  • [12] M. V. K. Raggi. Modelagem da Cin´etica Qu´ımica de Forma¸c˜ao de NoX e CO em Motores com Igni¸c˜ao por Centelha. PUC-MG, 2005.
  • [13] D.J. Patterson and N.A. Henein. Emissions from Combustion Engines and Their Control. Ann Arbot Science, pages 1–355, 1974.
Como citar:

LIMA, A. J. T. B. de; GALLO, W. L. R.; "CHEMICAL KINETICS ANALYSIS OF NO AND CO FORMATION BASED ON THERMODYNAMIC DATA FROM AN ETHANOL-FUELED ENGINE COMPUTATIONAL MODEL", p. 330-344 . In: . São Paulo: Blucher, 2017.
ISSN 2357-7592, DOI 10.5151/engpro-simea2017-25

últimos 30 dias | último ano | desde a publicação


downloads


visualizações


indexações